
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>控制div属性</title>
    <style>
        #outer{width:500px;margin:0 auto;padding:0;text-align:center;}
        #div1{width:100px;height:100px;background:black;margin:10px auto;display:block;}
    </style>
    <script>
        var changeStyle = function (elem, attr, value)
        {
            elem.style[attr] = value
        };
        window.onload = function ()
        {
            var oBtn = document.getElementsByTagName("input");
            var oDiv = document.getElementById("div1");
            var oAtt = ["width","height","background","display","display"];
            var oVal = ["200px","200px","red","none","block"];

            for (var i = 0; i < oBtn.length; i++)
            {
                oBtn[i].index = i;
                oBtn[i].onclick = function ()
                {
                    this.index == oBtn.length - 1 && (oDiv.style.cssText = "");
                    changeStyle(oDiv, oAtt[this.index], oVal[this.index])
                }
            }
        };
    </script>
</head>
<body>
<div id="outer">
    <input type="button" value="变宽" />
    <input type="button" value="变高" />
    <input type="button" value="变色" />
    <input type="button" value="隐藏" />
    <input type="button" value="重置" />
    <div id="div1"></div>
</div>
</body>
</html>
